fix_power_op_line_length preview style #8938
Description
Implement Black's fix_power_op_line_length style as a preview style in Ruff.
b = 1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1**1Should be formatted to
b = (
1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
** 1
)Notice the whitespace around the power op which we currently omit. This likely requires using if_group_breaks to only show the whitespace when the group breaks.